CN108035143B - Method for simultaneously improving interface strength and toughness of carbon fiber epoxy composite material - Google Patents
Method for simultaneously improving interface strength and toughness of carbon fiber epoxy composite material Download PDFInfo
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- CN108035143B CN108035143B CN201711479027.3A CN201711479027A CN108035143B CN 108035143 B CN108035143 B CN 108035143B CN 201711479027 A CN201711479027 A CN 201711479027A CN 108035143 B CN108035143 B CN 108035143B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic System; Titanates; Zirconates; Stannates; Plumbates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/55—Epoxy resins
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/40—Fibres of carbon
Abstract
A method for simultaneously improving the interface strength and toughness of a carbon fiber epoxy composite material solves the problem that the interface strength and toughness between carbon fibers and resin cannot be simultaneously improved by the existing carbon fiber treatment method. Zirconium oxide (ZrO) with silane coupling agent2) Surface modification; modifying the ZrO2Uniformly mixing the epoxy resin and the organic solvent to prepare a sizing agent; removing agent from the carbon fiber; and (3) passing the carbon fiber through a sizing tank filled with a sizing agent by adopting an impregnation method, and drying to finish the surface modification of the carbon fiber used by the carbon fiber epoxy composite material. The method makes full use of ZrO2And the uniform distribution of the chemical bonding material on the surface of the fiber strengthens and toughens the micro area of the interface, and strong and weak chemical bonding distributed at intervals is constructed on the interface, so that the interface strength is improved through the construction of chemical bonds, the reduction of the interface toughness caused by over-strengthening of the chemical bonds is avoided, and meanwhile, ZrO is utilized2The particles can block the expansion of the cracks and induce micro cracks, and the effect of dispersing the energy of the tips of the main cracks is achieved, so that the toughening effect is achieved.
Description
Technical Field
The invention belongs to the field of surface and interface modification of materials, and particularly relates to a method for simultaneously improving the interface strength and toughness of a carbon fiber epoxy composite material.
Background
The carbon fiber epoxy resin-based composite material has the characteristics of high specific strength, high specific modulus, excellent corrosion resistance, weather resistance and the like, so that the carbon fiber epoxy resin-based composite material is widely applied to the fields of aerospace, transportation, energy, sports and leisure articles and the like. The interface is an extremely important microstructure of the fiber composite material, and plays an important and even decisive role in the performance and the service behavior of the composite material. However, carbon fibers have problems of low surface energy, chemical inertness, etc., so that it is difficult to sufficiently wet and contact the carbon fibers with a resin, and the interface formed with the resin has low performance and poor stability. For this reason, the carbon fiber is subjected to surface modification treatment.
Electrolytic oxidation, chemical oxidation, irradiation modification, plasma grafting, molecular self-assembly, multi-scale nano modification and other means have been used for modifying the surface of carbon fiber, and although these methods can increase the content of oxygen-containing functional groups on the surface of carbon fiber, increase the roughness of the surface of the fiber, further improve the wettability of carbon fiber and resin, and improve the interfacial adhesion performance of composite materials, at the same time, the fracture strain capacity of the interface is reduced, the crack propagation capacity is prevented from being deteriorated, and the interface toughness is reduced. For structural members, strength and toughness are important indexes for determining the service life and the application field of materials, so that it is very important to find a method for simultaneously improving the interfacial strength and toughness of composite materials.
Disclosure of Invention
The invention aims to solve the problem that the interface strength and toughness of the carbon fiber and resin cannot be improved simultaneously when the carbon fiber is treated by the existing carbon fiber surface treatment method, and provides a method for improving the interface strength and toughness of a carbon fiber epoxy composite material simultaneously.
In order to achieve the purpose, the invention adopts the technical scheme that:
1) silane coupling agent modified ZrO2
2) modified ZrO2Preparation of epoxy sizing agent
Taking 0.1-5% of modified ZrO by mass percent2Uniformly mixing the nano particles, 0.5-3% of epoxy resin and 92-99.4% of organic solvent to obtain a sizing agent;
3) carbon fiber surface remover
Condensing and refluxing the carbon fiber at 70-80 ℃ for 12-48 h by using acetone as a solvent and adopting a Soxhlet extraction method, and then drying at 60-80 ℃ for 2-4 h;
or soaking the carbon fiber in a solution of acetone or petroleum ether for 12-72 h, and then drying at 60-80 ℃ for 2-4 h;
4) surface modification of carbon fibers
And (3) passing the carbon fiber through a sizing tank filled with a sizing agent by adopting an impregnation method, and drying to finish the surface modification of the carbon fiber used by the carbon fiber epoxy composite material.
ZrO of said step 1)2The particle size of the nanoparticles is 10-100 nm.
The silane coupling agent in the step 1) is one or a mixture of more than one of 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane and 3- [2- (2-aminoethylamino) ethylamino ] propyl-trimethoxysilane in any proportion.
The organic solvent in the step 2) is acetone, dimethylformamide, toluene, tetrahydrofuran or dichloromethane.
And the dipping time of the carbon fiber in the slurry tank in the step 4) is 10-30 s.
The drying condition in the step 4) is drying for 2 to 4 hours at the temperature of between 60 and 80 ℃.
The invention has the advantages that:
1) modified ZrO in sizing agent prepared by the invention2On the surface of particlesThe active functional group can react with the epoxy resin to form chemical bonding on the interface; simultaneous ZrO2The addition of the particles increases the surface roughness of the fiber, improves the wettability of the resin to the matrix, and does not contain ZrO2Compared with the sizing agent of the particles, the interfacial shear strength of the composite material is improved by 12 to 41 percent.
2) The sizing agent prepared by the invention can be uniformly coated on the surface of the carbon fiber, and strong and weak chemical bonds distributed at intervals can be formed in an interface region when the sizing agent is compounded with resin, so that the problem of interface toughness reduction caused by over-strong chemical bonding is avoided, and meanwhile, ZrO (zirconium oxide) is utilized2The particles can block the expansion of cracks and induce micro cracks, play a role in dispersing the energy of the tips of the main cracks and achieve the toughening effect, and do not contain ZrO2Compared with the sizing agent of the particles, the interfacial fracture toughness of the composite material is improved by 74-258%.
3) The surface treatment method of the carbon fiber is a sizing agent coating method, and the method is simple, efficient, good in repeatability and easy for industrial production.
Drawings
FIG. 1 is a scanning electron micrograph of a sizing-coated carbon fiber prepared in example 1 of the present invention.
FIG. 2 shows the case where no modified ZrO was added2Scanning electron micrographs of particles, epoxy sizing agent only coated carbon fibers.
FIG. 3 is a bar graph of the shear strength of the carbon fiber/epoxy interface, wherein 1 in FIG. 3 is the shear strength of the carbon fiber coated with only epoxy sizing agent obtained by the same method as in example 1, and 2 is the shear strength of the carbon fiber coated with 1 wt.% ZrO obtained in example 12Interfacial shear strength of the nanoparticle epoxy sizing agent coated carbon fibers.
FIG. 4 is a bar graph of fracture toughness at the carbon fiber/epoxy interface, wherein 1 in FIG. 4 is the fracture toughness at the interface of the carbon fiber coated with only epoxy sizing agent obtained by the same method as in example 1, and 2 is the fracture toughness at the interface of the carbon fiber coated with 1 wt.% ZrO obtained in example 12The interfacial fracture toughness of the nanoparticle epoxy sizing agent coated carbon fibers.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
1) silane coupling agent modified ZrO2
ZrO with a particle size of 10 to 100nm2Mixing the nano particles with an ethanol solution according to the proportion of 1: the mass ratio of 20 is mixed and stirred for 2 hours to ensure ZrO2The particles are evenly dispersed in ethanol solution to obtain ZrO2Ethanol solution; according to the following formula, 3-aminopropyltriethoxysilane coupling agent: ethanol solution: deionized water 1: 5: mixing a silane coupling agent and an ethanol solution according to the mass ratio of 0.2, then dropwise adding deionized water into the mixture, and magnetically stirring the mixture for 10min to promote the hydrolysis of the silane coupling agent to obtain a silane coupling agent mixed solution; according to ZrO2The ratio of the nano particles to the silane coupling agent is 1:1 the silane coupling agent mixed solution is added into ZrO2Stirring the mixture for 3 hours at the temperature of 60 ℃ in an ethanol solution to finish the reaction of the silane coupling agent on ZrO2Grafting of (1), the grafted ZrO2The particles are respectively washed by water and ethanol and are dried in an oven at the temperature of 80 ℃ to obtain the ZrO with modified surface2Nanoparticles;
2) modified ZrO2Preparation of epoxy sizing agent
Taking 1 percent of modified ZrO according to mass percentage2Uniformly mixing nano particles, 1% of bisphenol A diglycidyl ether (E51) epoxy resin and 98% of organic solvent acetone to obtain a sizing agent;
3) carbon fiber surface remover
Condensing and refluxing the carbon fiber at 80 ℃ for 48h by using acetone as a solvent and adopting a Soxhlet extraction method to remove original slurry and pollutants on the surface of the commercialized carbon fiber, and then drying for 2h at 70 ℃;
4) surface modification of carbon fibers
And (3) soaking the carbon fiber for 20s by adopting a soaking method through a slurry tank filled with a sizing agent, and drying for 3h at 80 ℃, thus finishing the surface modification of the carbon fiber used by the carbon fiber epoxy composite material.
The sizing agent prepared as shown in FIG. 1 can be uniformly coated on the surface of the fiber, and ZrO is added2The particles are uniformly distributed in the sizing agent, and the agglomeration phenomenon is avoided.
Comparison of unmodified ZrO as shown in FIG. 32Particle sizing coated carbon fibers (see figure)2) that only 1% of bisphenol a diglycidyl ether (E51) epoxy resin and 99% of acetone, the interfacial shear strength increased by 41.3%.
As shown in FIG. 4, compared with the case where no modified ZrO was added2The interfacial fracture toughness of the particle sizing coated carbon fiber was increased by 257.6%.
Example 2:
1) silane coupling agent modified ZrO2
ZrO with a particle size of 10 to 100nm2Mixing the nano particles with an ethanol solution according to the proportion of 1:1, the ZrO is ensured by mixing and magnetically stirring for 6 hours2The particles are evenly dispersed in ethanol solution to obtain ZrO2Ethanol solution; according to the formula gamma-glycidoxypropyltrimethoxysilane and 3- [2- (2-aminoethylamino) ethylamino]Mixture of propyl-trimethoxysilane: ethanol solution: deionized water 1: 10: mixing a silane coupling agent and an ethanol solution according to the mass ratio of 0.3, then dropwise adding deionized water into the mixture, and magnetically stirring the mixture for 5min to promote the hydrolysis of the silane coupling agent to obtain a silane coupling agent mixed solution; according to ZrO2The ratio of the nano particles to the silane coupling agent is 1: 2 adding the silane coupling agent mixed solution into ZrO in a mass ratio2Stirring the mixture for 1 hour at the temperature of 60 ℃ in an ethanol solution to finish the reaction of the silane coupling agent on ZrO2Grafting of (1), the grafted ZrO2The particles are respectively washed by water and ethanol and are dried in an oven at the temperature of 80 ℃ to obtain the ZrO with modified surface2Nanoparticles;
2) modified ZrO2Preparation of epoxy sizing agent
Taking 0.5 percent of modified ZrO according to mass percentage2Uniformly mixing nano particles, 3% of bisphenol A diglycidyl ether (E51) epoxy resin and 96.5% of organic solvent dimethylformamide to obtain a sizing agent;
3) carbon fiber surface remover
Condensing and refluxing the carbon fiber at 70 ℃ for 24h by using acetone as a solvent and adopting a Soxhlet extraction method to remove original slurry and pollutants on the surface of the commercialized carbon fiber, and drying for 3h at 60 ℃;
4) surface modification of carbon fibers
And soaking the carbon fiber in a slurry tank filled with a sizing agent for 10s by adopting a soaking method, and drying at 60 ℃ for 4h to finish the surface modification of the carbon fiber used by the carbon fiber epoxy composite material.
Compared with the ZrO not added with the modified ZrO2The interfacial shear strength of the modified carbon fiber prepared in example 2 and the epoxy resin was increased by 11.9% and the interfacial fracture toughness increased by 110.9% for the carbon fiber coated with the particle sizing agent.
Example 3:
1) silane coupling agent modified ZrO2
ZrO with a particle size of 10 to 100nm2Mixing the nano particles with an ethanol solution according to the proportion of 1: 50 mass ratio, magnetic stirring for 0.5h to ensure ZrO2The particles are evenly dispersed in ethanol solution to obtain ZrO2Ethanol solution; according to the following formula, the coupling agent of 3-aminopropyl trimethoxy silane: ethanol solution: deionized water 1: 8: mixing a silane coupling agent and an ethanol solution according to the mass ratio of 0.1, then dropwise adding deionized water into the mixture, and magnetically stirring the mixture for 8min to promote the hydrolysis of the silane coupling agent to obtain a silane coupling agent mixed solution; according to ZrO2The ratio of the nano particles to the silane coupling agent is 1: 3 adding the silane coupling agent mixed solution into ZrO according to the mass ratio2Stirring the mixture for 2 hours at the temperature of 60 ℃ in an ethanol solution to finish the reaction of the silane coupling agent on ZrO2Grafting of (1), the grafted ZrO2The particles are respectively washed by water and ethanol and are dried in an oven at the temperature of 80 ℃ to obtain the ZrO with modified surface2Nanoparticles;
2) modified ZrO2Preparation of epoxy sizing agent
Taking 2 percent of modified ZrO by mass percentage2Uniformly mixing nano particles, 0.5 percent of bisphenol A diglycidyl ether (E51) epoxy resin and 97.5 percent of organic solvent toluene to obtain a sizing agent;
3) carbon fiber surface remover
Condensing and refluxing the carbon fiber at 75 ℃ for 12h by using acetone as a solvent and adopting a Soxhlet extraction method to remove original slurry and pollutants on the surface of the commercialized carbon fiber, and drying for 4h at 80 ℃;
4) surface modification of carbon fibers
And soaking the carbon fiber for 15s by a slurry tank filled with a sizing agent by adopting a soaking method, and drying at 75 ℃ for 2.5h to finish the surface modification of the carbon fiber used by the carbon fiber epoxy composite material.
Compared with the ZrO not added with the modified ZrO2The interfacial shear strength of the modified carbon fiber prepared in example 3 and the epoxy resin was improved by 14.7% and the interfacial fracture toughness by 73.6% for the carbon fiber coated with the particle sizing agent.
Example 4:
1) silane coupling agent modified ZrO2
ZrO with a particle size of 10 to 100nm2Mixing the nano particles with an ethanol solution according to the proportion of 1: 30 mass ratio, magnetic stirring for 3 hours to ensure ZrO2The particles are evenly dispersed in ethanol solution to obtain ZrO2Ethanol solution; according to the formula 3- [2- (2-aminoethylamino) ethylamino]Propyl-trimethoxysilane coupling agent: ethanol solution: deionized water 1: 15: mixing a silane coupling agent and an ethanol solution according to the mass ratio of 0.4, then dropwise adding deionized water into the mixture, and magnetically stirring the mixture for 10min to promote the hydrolysis of the silane coupling agent to obtain a silane coupling agent mixed solution; according to ZrO2The ratio of the nano particles to the silane coupling agent is 1: 1.5 adding the silane coupling agent mixed solution to ZrO2Stirring the mixture for 5 hours at the temperature of 60 ℃ in an ethanol solution to finish the reaction of the silane coupling agent on ZrO2Grafting of (1), the grafted ZrO2The particles are respectively washed by water and ethanol and are dried in an oven at the temperature of 80 ℃ to obtain the ZrO with modified surface2Nanoparticles;
2) modified ZrO2Preparation of epoxy sizing agent
Taking 5 percent of modified ZrO according to mass percentage2Uniformly mixing nano particles, 2% of bisphenol A diglycidyl ether (E51) epoxy resin and 93% of organic solvent tetrahydrofuran or dichloromethane to obtain a sizing agent;
3) carbon fiber surface remover
Soaking carbon fiber in acetone or petroleum ether solution for 12h, and drying at 80 deg.C for 2 h;
4) surface modification of carbon fibers
And soaking the carbon fiber in a slurry tank filled with a sizing agent for 25s by adopting a soaking method, and drying at 65 ℃ for 3.5h to finish the surface modification of the carbon fiber used for the carbon fiber epoxy composite material.
Compared with the ZrO not added with the modified ZrO2The particle sizing agent coated carbon fiber, the modified carbon fiber prepared in example 4, has an improved interfacial shear strength with epoxy resin of 51.1% and an improved interfacial fracture toughness of 310.6%.
Example 5:
1) silane coupling agent modified ZrO2
ZrO with a particle size of 10 to 100nm2Mixing the nano particles with an ethanol solution according to the proportion of 1: 40 mass ratio, and magnetic stirring for 4 hours to ensure ZrO2The particles are evenly dispersed in ethanol solution to obtain ZrO2Ethanol solution; according to the formula, the gamma-glycidyl ether oxypropyl trimethoxy silane coupling agent: ethanol solution: deionized water 1: 20: mixing a silane coupling agent and an ethanol solution according to the mass ratio of 0.6, then dropwise adding deionized water into the mixture, and magnetically stirring the mixture for 20min to promote the hydrolysis of the silane coupling agent to obtain a silane coupling agent mixed solution; according to ZrO2The ratio of the nano particles to the silane coupling agent is 1: 2.5 adding the silane coupling agent mixed solution to ZrO2Stirring the mixture for 6 hours at the temperature of 60 ℃ in an ethanol solution to finish the reaction of the silane coupling agent on ZrO2Grafting of (1), the grafted ZrO2The particles are respectively washed by water and ethanol and are dried in an oven at the temperature of 80 ℃ to obtain the ZrO with modified surface2Nanoparticles;
2) modified ZrO2Preparation of epoxy sizing agent
Taking 3 percent of modified ZrO by mass percentage2Uniformly mixing nano particles, 2% of bisphenol A diglycidyl ether (E51) epoxy resin and 95% of organic solvent acetone to obtain a sizing agent;
3) carbon fiber surface remover
Soaking carbon fiber in acetone or petroleum ether solution for 72h, and drying at 60 deg.C for 4 h;
4) surface modification of carbon fibers
And (3) soaking the carbon fiber for 30s by adopting a soaking method through a slurry tank filled with a sizing agent, and then drying for 2h at 70 ℃, thus finishing the surface modification of the carbon fiber used by the carbon fiber epoxy composite material.
Compared with the ZrO not added with the modified ZrO2Particle sizing agent coatingThe interface shear strength of the modified carbon fiber prepared in example 5 and the epoxy resin is improved by 24.1%, and the interface fracture toughness is improved by 82.3%.
Claims (6)
1. A method for simultaneously improving the interface strength and toughness of a carbon fiber epoxy composite material is characterized by comprising the following steps:
1) silane coupling agent modified ZrO2
ZrO 2 is mixed with2Mixing the nano particles and the ethanol solution according to the mass ratio of 1: 1-50, and magnetically stirring for 0.5-6 h to obtain ZrO2Ethanol solution; according to the silane coupling agent: ethanol solution: deionized water 1: 5-20: mixing a silane coupling agent and an ethanol solution according to the mass ratio of 0.1-0.6, then dropwise adding deionized water into the mixture, and stirring for 5-20 min to obtain a silane coupling agent mixed solution; according to ZrO2Adding the mixed solution of the silane coupling agent into ZrO according to the mass ratio of the nano particles to the silane coupling agent of 1:1-32Stirring the mixture for 1 to 6 hours at the temperature of 60 ℃ in an ethanol solution to finish the reaction of the silane coupling agent on ZrO2Grafting of (1), the grafted ZrO2Washing the particles with water and ethanol respectively, and drying to obtain the surface-modified ZrO2Nanoparticles;
2) modified ZrO2Preparation of epoxy sizing agent
Taking 0.1-5% of modified ZrO by mass percent2Uniformly mixing the nano particles, 0.5-3% of epoxy resin and 92-99.4% of organic solvent to obtain a sizing agent;
3) carbon fiber surface remover
Condensing and refluxing the carbon fiber at 70-80 ℃ for 12-48 h by using acetone as a solvent and adopting a Soxhlet extraction method, and then drying at 60-80 ℃ for 2-4 h;
or soaking the carbon fiber in a solution of acetone or petroleum ether for 12-72 h, and then drying at 60-80 ℃ for 2-4 h;
4) surface modification of carbon fibers
And (3) passing the carbon fiber through a sizing tank filled with a sizing agent by adopting an impregnation method, and drying to finish the surface modification of the carbon fiber used by the carbon fiber epoxy composite material.
2. The method for simultaneously improving the interfacial strength and toughness of the carbon fiber epoxy composite material according to claim 1, wherein: ZrO of said step 1)2The particle size of the nanoparticles is 10-100 nm.
3. The method for simultaneously improving the interfacial strength and toughness of the carbon fiber epoxy composite material according to claim 1, wherein: the silane coupling agent in the step 1) is one or a mixture of more than one of 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane and 3- [2- (2-aminoethylamino) ethylamino ] propyl-trimethoxysilane in any proportion.
4. The method for simultaneously improving the interfacial strength and toughness of the carbon fiber epoxy composite material according to claim 1, wherein: the organic solvent in the step 2) is acetone, dimethylformamide, toluene, tetrahydrofuran or dichloromethane.
5. The method for simultaneously improving the interfacial strength and toughness of the carbon fiber epoxy composite material according to claim 1, wherein: and the dipping time of the carbon fiber in the slurry tank in the step 4) is 10-30 s.
6. The method for simultaneously improving the interfacial strength and toughness of the carbon fiber epoxy composite material according to claim 1, wherein: the drying condition in the step 4) is drying for 2 to 4 hours at the temperature of between 60 and 80 ℃.
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| EP3882213B1 (en) * | 2018-11-16 | 2023-07-12 | Orbray Co., Ltd. | Method for producing zirconia material |
| CN109895469A (en) * | 2019-03-05 | 2019-06-18 | 江苏恒神股份有限公司 | A method of optimization carbon fiber in epoxy composite system interface performance |
| CN110079993B (en) * | 2019-04-28 | 2021-09-17 | 陕西科技大学 | Method for surface modification of carbon fiber by zirconium dioxide/graphene oxide |
| CN112760972B (en) * | 2019-11-04 | 2021-11-16 | 中国科学院化学研究所 | PBO fiber sizing agent containing benzoxazole diamine compatilizer and application thereof |
| CN112144270A (en) * | 2020-09-24 | 2020-12-29 | 肇庆市海特复合材料技术研究院 | Preparation method of composite material for improving interface shear strength |
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| 《纳米涂层在碳纤维/环氧基复合材料中的应用》;汪信等;《南京理工大学学报》;20031031;第27卷(第5期);第636-641 * |
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